gray level cooccurrence matrix

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mahesh chathuranga
mahesh chathuranga 2013-9-23
my matrix is
a=[1 1 5 6 8;
2 3 5 7 1;
4 5 7 1 2;
8 5 1 2 5];
i apply the function *graycomatrix(a)* ;my out put is 8*8 matrix pixel(8,8)=16 and all other values are zero;
but i want to obtain following matrix.
[1 2 0 0 1 0 0 0;
0 0 1 0 1 0 0 0;
0 0 0 0 1 0 0 0;
1 0 0 0 0 1 2 0 ;
0 0 0 0 0 0 0 1;
2 0 0 0 0 0 0 0;
0 0 0 0 1 0 0 0];
when i'm applying *graycomatrix(mat2gray(a))* ;it gives the correct out put.what is the difference between these two.

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回答（1 个）

Image Analyst
Image Analyst 2013-9-23
The default is to bin gray levels into 32 gray level wide bins. You can override that and have 256 bins if you want - it's one of the input options.

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